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- A mixture containing glutamic acid, arginine, phenylalanine and valine was subjected to anion exchange chromatography at pH 7.0. Which of the amino acids interacted with the resin (anion exchanger) and last to be eluted with a buffer of decreasing pH? A. Glu B. Val C. Phe D. Arg12. If strong-base anion exchange resin is applied to treat raw water with silicate, the pH of raw water should be A. acidic B. neutral c. basic D. no demanding 13 In electrodialysis process with polarization, fouling layer occurs in the A. concentrate chamber; anion B. concentrate chamber; cation c. dilute chamber; anion D. dilute chamber; cation side of membrane.What is the conjugate base of the weak acid, CH3COOH if it reacts with H2O in an acid-base reaction? A. H3O* B. CH3COO С. ОН- D. H2O E. CH3COO
- 6. CONSTANT VOLUME CALORIMETRY Using a bomb calorimeter, 1.0 g of benzene (CcH6), a component of gasoline, was combusted to determine its energy content.2000 mL of water was used. a. Arrange the following steps of the CVC technique in chronological order. Connect the ignition wire to the sample using a cotton string. Cover the oxygen vessel bottom. Fill the calorimeter with 2000 mL of water. Fill the reaction vessel with oxygen. Ignite and analyze the results. Place the crucible into the oxygen vessel top. Place the vessel atop the calorimeter dock and insert. Put 1.0g of benzene into the crucible using a pipette. Weigh the crucible and tare.3. What are the effects of the following solvents when mixed with lipids? What type of hydrolysis is present when mixed withthose solvents? Explaina. waterb. CCl 4c. Etherd. CHCl17. 1- Butanol was converted into butyl propanoate by reaction with an excess of propanoic acid. What is the name of this reaction? A. Acid-base reaction B. Base hydrolysis C. Acid hydrolysis D. Esterification
- 1. Calculate the pH of the following solutions a. 2 μM HCI b. 3 x 10-³ M KOH4. A 100.0-mL sample of brackish water was made ammoniacal, and the sulfide it contained was titrated with 16.47 mL of 0.02310 M AgNO3. The analytical reaction is Calculate the concentration of H2S in the water in parts per million, cppm.7. For those drugs that need to be applied with dissolution sustained system, what are their original properties? A. Low aqueous solubility and slow dissolution rate B. High aqueous solubility and slow dissolution rate C. Low aqueous solubility and fast dissolution rate D. High aqueous solubility and fast dissolution rate E. Gaseous state in room temperature with low aqueous solubility 8. Which of the following drug injection methods does involve perpendicularly inserting needle to the patient's body? A. Intramuscular injection B. Intravenous injection C. Subcutaneous injection D. Intradermal injection E. None of the above 9. Which of the following proteins is NOT commonly bound with drug in the bloodstream? A. Albumins B. Globulins C. Fibrinogens D. Antibodies E. None of the above 10. Which of the following events cannot increase the bioavailability of a drug? A. Patients suffer from cirrhosis B. Patients suffer from diarrhea C. Switch to intravenous injection from oral administration…
- What is the purpose of: A. The concentrated salt solution? B. adding isopropyl alcohol to the solution? Why does it need to be in low temperature?Which of the following ionizes completely in solution and is considered to be a strong acid? Select one: O a. NAOH O b. HCL O c. NH3 O d. H2CO3 O e. CH3COOH5. In the Chemical Changes experiment (E3) on copper, which of the steps can be omitted if our goal is only to obtain dry copper(II) oxide solid? a. Decanting and adding sulfuric acid to dissolve black precipitate b. Addition of NaOH to Cu(NO3)2 solution c. Filtering and heating until dry and fully black d. Boiling of previous solution until black